You can find old exams from the webpage:
http://www.ee.oulu.fi/research/opintotoimisto/WikinLiitetiedostot/Tentit/TenttiArkisto/
Old mathematic exams can be found from the hallway of Mathematic division and by asking from the office of the Mathematic division.
Old physic exams can be found from the hallway in the second floor of the Physics department and by asking from the office of the physics department.